chore: use node20 environment for staging

[atomrc]

Description

This will start using the wire-webapp-staging (running node20) as the deployment target for staging bumps.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 46.13%. Comparing base (b8dfff8) to head (64e8e8a).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #17654      +/-   ##
==========================================
- Coverage   46.15%   46.13%   -0.02%     
==========================================
  Files         760      760              
  Lines       24987    24987              
  Branches     5720     5720              
==========================================
- Hits        11533    11529       -4     
- Misses      12010    12013       +3     
- Partials     1444     1445       +1     

[tlebon]

this is superceded by #17598 . i think that one slipped thru the cracks since i submitted it before vacation but didnt publicize it enough